671 lines
23 KiB
Python
671 lines
23 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2014-2016 OpenMarket Ltd
|
|
# Copyright 2018 New Vector Ltd
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
import logging
|
|
import urllib
|
|
from io import BytesIO
|
|
|
|
import treq
|
|
from canonicaljson import encode_canonical_json, json
|
|
from netaddr import IPAddress
|
|
from prometheus_client import Counter
|
|
from zope.interface import implementer, provider
|
|
|
|
from OpenSSL import SSL
|
|
from OpenSSL.SSL import VERIFY_NONE
|
|
from twisted.internet import defer, protocol, ssl
|
|
from twisted.internet.interfaces import (
|
|
IReactorPluggableNameResolver,
|
|
IResolutionReceiver,
|
|
)
|
|
from twisted.python.failure import Failure
|
|
from twisted.web._newclient import ResponseDone
|
|
from twisted.web.client import Agent, HTTPConnectionPool, readBody
|
|
from twisted.web.http import PotentialDataLoss
|
|
from twisted.web.http_headers import Headers
|
|
|
|
from synapse.api.errors import Codes, HttpResponseException, SynapseError
|
|
from synapse.http import (
|
|
QuieterFileBodyProducer,
|
|
cancelled_to_request_timed_out_error,
|
|
redact_uri,
|
|
)
|
|
from synapse.http.proxyagent import ProxyAgent
|
|
from synapse.logging.context import make_deferred_yieldable
|
|
from synapse.logging.opentracing import set_tag, start_active_span, tags
|
|
from synapse.util.async_helpers import timeout_deferred
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
outgoing_requests_counter = Counter("synapse_http_client_requests", "", ["method"])
|
|
incoming_responses_counter = Counter(
|
|
"synapse_http_client_responses", "", ["method", "code"]
|
|
)
|
|
|
|
|
|
def check_against_blacklist(ip_address, ip_whitelist, ip_blacklist):
|
|
"""
|
|
Args:
|
|
ip_address (netaddr.IPAddress)
|
|
ip_whitelist (netaddr.IPSet)
|
|
ip_blacklist (netaddr.IPSet)
|
|
"""
|
|
if ip_address in ip_blacklist:
|
|
if ip_whitelist is None or ip_address not in ip_whitelist:
|
|
return True
|
|
return False
|
|
|
|
|
|
class IPBlacklistingResolver(object):
|
|
"""
|
|
A proxy for reactor.nameResolver which only produces non-blacklisted IP
|
|
addresses, preventing DNS rebinding attacks on URL preview.
|
|
"""
|
|
|
|
def __init__(self, reactor, ip_whitelist, ip_blacklist):
|
|
"""
|
|
Args:
|
|
reactor (twisted.internet.reactor)
|
|
ip_whitelist (netaddr.IPSet)
|
|
ip_blacklist (netaddr.IPSet)
|
|
"""
|
|
self._reactor = reactor
|
|
self._ip_whitelist = ip_whitelist
|
|
self._ip_blacklist = ip_blacklist
|
|
|
|
def resolveHostName(self, recv, hostname, portNumber=0):
|
|
|
|
r = recv()
|
|
addresses = []
|
|
|
|
def _callback():
|
|
r.resolutionBegan(None)
|
|
|
|
has_bad_ip = False
|
|
for i in addresses:
|
|
ip_address = IPAddress(i.host)
|
|
|
|
if check_against_blacklist(
|
|
ip_address, self._ip_whitelist, self._ip_blacklist
|
|
):
|
|
logger.info(
|
|
"Dropped %s from DNS resolution to %s due to blacklist"
|
|
% (ip_address, hostname)
|
|
)
|
|
has_bad_ip = True
|
|
|
|
# if we have a blacklisted IP, we'd like to raise an error to block the
|
|
# request, but all we can really do from here is claim that there were no
|
|
# valid results.
|
|
if not has_bad_ip:
|
|
for i in addresses:
|
|
r.addressResolved(i)
|
|
r.resolutionComplete()
|
|
|
|
@provider(IResolutionReceiver)
|
|
class EndpointReceiver(object):
|
|
@staticmethod
|
|
def resolutionBegan(resolutionInProgress):
|
|
pass
|
|
|
|
@staticmethod
|
|
def addressResolved(address):
|
|
addresses.append(address)
|
|
|
|
@staticmethod
|
|
def resolutionComplete():
|
|
_callback()
|
|
|
|
self._reactor.nameResolver.resolveHostName(
|
|
EndpointReceiver, hostname, portNumber=portNumber
|
|
)
|
|
|
|
return r
|
|
|
|
|
|
class BlacklistingAgentWrapper(Agent):
|
|
"""
|
|
An Agent wrapper which will prevent access to IP addresses being accessed
|
|
directly (without an IP address lookup).
|
|
"""
|
|
|
|
def __init__(self, agent, reactor, ip_whitelist=None, ip_blacklist=None):
|
|
"""
|
|
Args:
|
|
agent (twisted.web.client.Agent): The Agent to wrap.
|
|
reactor (twisted.internet.reactor)
|
|
ip_whitelist (netaddr.IPSet)
|
|
ip_blacklist (netaddr.IPSet)
|
|
"""
|
|
self._agent = agent
|
|
self._ip_whitelist = ip_whitelist
|
|
self._ip_blacklist = ip_blacklist
|
|
|
|
def request(self, method, uri, headers=None, bodyProducer=None):
|
|
h = urllib.parse.urlparse(uri.decode("ascii"))
|
|
|
|
try:
|
|
ip_address = IPAddress(h.hostname)
|
|
|
|
if check_against_blacklist(
|
|
ip_address, self._ip_whitelist, self._ip_blacklist
|
|
):
|
|
logger.info("Blocking access to %s due to blacklist" % (ip_address,))
|
|
e = SynapseError(403, "IP address blocked by IP blacklist entry")
|
|
return defer.fail(Failure(e))
|
|
except Exception:
|
|
# Not an IP
|
|
pass
|
|
|
|
return self._agent.request(
|
|
method, uri, headers=headers, bodyProducer=bodyProducer
|
|
)
|
|
|
|
|
|
class SimpleHttpClient(object):
|
|
"""
|
|
A simple, no-frills HTTP client with methods that wrap up common ways of
|
|
using HTTP in Matrix
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
hs,
|
|
treq_args={},
|
|
ip_whitelist=None,
|
|
ip_blacklist=None,
|
|
http_proxy=None,
|
|
https_proxy=None,
|
|
):
|
|
"""
|
|
Args:
|
|
hs (synapse.server.HomeServer)
|
|
treq_args (dict): Extra keyword arguments to be given to treq.request.
|
|
ip_blacklist (netaddr.IPSet): The IP addresses that are blacklisted that
|
|
we may not request.
|
|
ip_whitelist (netaddr.IPSet): The whitelisted IP addresses, that we can
|
|
request if it were otherwise caught in a blacklist.
|
|
http_proxy (bytes): proxy server to use for http connections. host[:port]
|
|
https_proxy (bytes): proxy server to use for https connections. host[:port]
|
|
"""
|
|
self.hs = hs
|
|
|
|
self._ip_whitelist = ip_whitelist
|
|
self._ip_blacklist = ip_blacklist
|
|
self._extra_treq_args = treq_args
|
|
|
|
self.user_agent = hs.version_string
|
|
self.clock = hs.get_clock()
|
|
if hs.config.user_agent_suffix:
|
|
self.user_agent = "%s %s" % (self.user_agent, hs.config.user_agent_suffix)
|
|
|
|
self.user_agent = self.user_agent.encode("ascii")
|
|
|
|
if self._ip_blacklist:
|
|
real_reactor = hs.get_reactor()
|
|
# If we have an IP blacklist, we need to use a DNS resolver which
|
|
# filters out blacklisted IP addresses, to prevent DNS rebinding.
|
|
nameResolver = IPBlacklistingResolver(
|
|
real_reactor, self._ip_whitelist, self._ip_blacklist
|
|
)
|
|
|
|
@implementer(IReactorPluggableNameResolver)
|
|
class Reactor(object):
|
|
def __getattr__(_self, attr):
|
|
if attr == "nameResolver":
|
|
return nameResolver
|
|
else:
|
|
return getattr(real_reactor, attr)
|
|
|
|
self.reactor = Reactor()
|
|
else:
|
|
self.reactor = hs.get_reactor()
|
|
|
|
# the pusher makes lots of concurrent SSL connections to sygnal, and
|
|
# tends to do so in batches, so we need to allow the pool to keep
|
|
# lots of idle connections around.
|
|
pool = HTTPConnectionPool(self.reactor)
|
|
# XXX: The justification for using the cache factor here is that larger instances
|
|
# will need both more cache and more connections.
|
|
# Still, this should probably be a separate dial
|
|
pool.maxPersistentPerHost = max((100 * hs.config.caches.global_factor, 5))
|
|
pool.cachedConnectionTimeout = 2 * 60
|
|
|
|
self.agent = ProxyAgent(
|
|
self.reactor,
|
|
connectTimeout=15,
|
|
contextFactory=self.hs.get_http_client_context_factory(),
|
|
pool=pool,
|
|
http_proxy=http_proxy,
|
|
https_proxy=https_proxy,
|
|
)
|
|
|
|
if self._ip_blacklist:
|
|
# If we have an IP blacklist, we then install the blacklisting Agent
|
|
# which prevents direct access to IP addresses, that are not caught
|
|
# by the DNS resolution.
|
|
self.agent = BlacklistingAgentWrapper(
|
|
self.agent,
|
|
self.reactor,
|
|
ip_whitelist=self._ip_whitelist,
|
|
ip_blacklist=self._ip_blacklist,
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def request(self, method, uri, data=None, headers=None):
|
|
"""
|
|
Args:
|
|
method (str): HTTP method to use.
|
|
uri (str): URI to query.
|
|
data (bytes): Data to send in the request body, if applicable.
|
|
headers (t.w.http_headers.Headers): Request headers.
|
|
"""
|
|
# A small wrapper around self.agent.request() so we can easily attach
|
|
# counters to it
|
|
outgoing_requests_counter.labels(method).inc()
|
|
|
|
# log request but strip `access_token` (AS requests for example include this)
|
|
logger.info("Sending request %s %s", method, redact_uri(uri))
|
|
|
|
with start_active_span(
|
|
"outgoing-client-request",
|
|
tags={
|
|
tags.SPAN_KIND: tags.SPAN_KIND_RPC_CLIENT,
|
|
tags.HTTP_METHOD: method,
|
|
tags.HTTP_URL: uri,
|
|
},
|
|
finish_on_close=True,
|
|
):
|
|
try:
|
|
body_producer = None
|
|
if data is not None:
|
|
body_producer = QuieterFileBodyProducer(BytesIO(data))
|
|
|
|
request_deferred = treq.request(
|
|
method,
|
|
uri,
|
|
agent=self.agent,
|
|
data=body_producer,
|
|
headers=headers,
|
|
**self._extra_treq_args
|
|
)
|
|
request_deferred = timeout_deferred(
|
|
request_deferred,
|
|
60,
|
|
self.hs.get_reactor(),
|
|
cancelled_to_request_timed_out_error,
|
|
)
|
|
response = yield make_deferred_yieldable(request_deferred)
|
|
|
|
incoming_responses_counter.labels(method, response.code).inc()
|
|
logger.info(
|
|
"Received response to %s %s: %s",
|
|
method,
|
|
redact_uri(uri),
|
|
response.code,
|
|
)
|
|
return response
|
|
except Exception as e:
|
|
incoming_responses_counter.labels(method, "ERR").inc()
|
|
logger.info(
|
|
"Error sending request to %s %s: %s %s",
|
|
method,
|
|
redact_uri(uri),
|
|
type(e).__name__,
|
|
e.args[0],
|
|
)
|
|
set_tag(tags.ERROR, True)
|
|
set_tag("error_reason", e.args[0])
|
|
raise
|
|
|
|
@defer.inlineCallbacks
|
|
def post_urlencoded_get_json(self, uri, args={}, headers=None):
|
|
"""
|
|
Args:
|
|
uri (str):
|
|
args (dict[str, str|List[str]]): query params
|
|
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
|
|
Returns:
|
|
Deferred[object]: parsed json
|
|
|
|
Raises:
|
|
HttpResponseException: On a non-2xx HTTP response.
|
|
|
|
ValueError: if the response was not JSON
|
|
"""
|
|
|
|
# TODO: Do we ever want to log message contents?
|
|
logger.debug("post_urlencoded_get_json args: %s", args)
|
|
|
|
query_bytes = urllib.parse.urlencode(encode_urlencode_args(args), True).encode(
|
|
"utf8"
|
|
)
|
|
|
|
actual_headers = {
|
|
b"Content-Type": [b"application/x-www-form-urlencoded"],
|
|
b"User-Agent": [self.user_agent],
|
|
b"Accept": [b"application/json"],
|
|
}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request(
|
|
"POST", uri, headers=Headers(actual_headers), data=query_bytes
|
|
)
|
|
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
|
|
if 200 <= response.code < 300:
|
|
return json.loads(body)
|
|
else:
|
|
raise HttpResponseException(response.code, response.phrase, body)
|
|
|
|
@defer.inlineCallbacks
|
|
def post_json_get_json(self, uri, post_json, headers=None):
|
|
"""
|
|
|
|
Args:
|
|
uri (str):
|
|
post_json (object):
|
|
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
|
|
Returns:
|
|
Deferred[object]: parsed json
|
|
|
|
Raises:
|
|
HttpResponseException: On a non-2xx HTTP response.
|
|
|
|
ValueError: if the response was not JSON
|
|
"""
|
|
json_str = encode_canonical_json(post_json)
|
|
|
|
logger.debug("HTTP POST %s -> %s", json_str, uri)
|
|
|
|
actual_headers = {
|
|
b"Content-Type": [b"application/json"],
|
|
b"User-Agent": [self.user_agent],
|
|
b"Accept": [b"application/json"],
|
|
}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request(
|
|
"POST", uri, headers=Headers(actual_headers), data=json_str
|
|
)
|
|
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
|
|
if 200 <= response.code < 300:
|
|
return json.loads(body)
|
|
else:
|
|
raise HttpResponseException(response.code, response.phrase, body)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_json(self, uri, args={}, headers=None):
|
|
""" Gets some json from the given URI.
|
|
|
|
Args:
|
|
uri (str): The URI to request, not including query parameters
|
|
args (dict): A dictionary used to create query strings, defaults to
|
|
None.
|
|
**Note**: The value of each key is assumed to be an iterable
|
|
and *not* a string.
|
|
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
Returns:
|
|
Deferred: Succeeds when we get *any* 2xx HTTP response, with the
|
|
HTTP body as JSON.
|
|
Raises:
|
|
HttpResponseException On a non-2xx HTTP response.
|
|
|
|
ValueError: if the response was not JSON
|
|
"""
|
|
actual_headers = {b"Accept": [b"application/json"]}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
body = yield self.get_raw(uri, args, headers=headers)
|
|
return json.loads(body)
|
|
|
|
@defer.inlineCallbacks
|
|
def put_json(self, uri, json_body, args={}, headers=None):
|
|
""" Puts some json to the given URI.
|
|
|
|
Args:
|
|
uri (str): The URI to request, not including query parameters
|
|
json_body (dict): The JSON to put in the HTTP body,
|
|
args (dict): A dictionary used to create query strings, defaults to
|
|
None.
|
|
**Note**: The value of each key is assumed to be an iterable
|
|
and *not* a string.
|
|
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
Returns:
|
|
Deferred: Succeeds when we get *any* 2xx HTTP response, with the
|
|
HTTP body as JSON.
|
|
Raises:
|
|
HttpResponseException On a non-2xx HTTP response.
|
|
|
|
ValueError: if the response was not JSON
|
|
"""
|
|
if len(args):
|
|
query_bytes = urllib.parse.urlencode(args, True)
|
|
uri = "%s?%s" % (uri, query_bytes)
|
|
|
|
json_str = encode_canonical_json(json_body)
|
|
|
|
actual_headers = {
|
|
b"Content-Type": [b"application/json"],
|
|
b"User-Agent": [self.user_agent],
|
|
b"Accept": [b"application/json"],
|
|
}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request(
|
|
"PUT", uri, headers=Headers(actual_headers), data=json_str
|
|
)
|
|
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
|
|
if 200 <= response.code < 300:
|
|
return json.loads(body)
|
|
else:
|
|
raise HttpResponseException(response.code, response.phrase, body)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_raw(self, uri, args={}, headers=None):
|
|
""" Gets raw text from the given URI.
|
|
|
|
Args:
|
|
uri (str): The URI to request, not including query parameters
|
|
args (dict): A dictionary used to create query strings, defaults to
|
|
None.
|
|
**Note**: The value of each key is assumed to be an iterable
|
|
and *not* a string.
|
|
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
Returns:
|
|
Deferred: Succeeds when we get *any* 2xx HTTP response, with the
|
|
HTTP body at text.
|
|
Raises:
|
|
HttpResponseException on a non-2xx HTTP response.
|
|
"""
|
|
if len(args):
|
|
query_bytes = urllib.parse.urlencode(args, True)
|
|
uri = "%s?%s" % (uri, query_bytes)
|
|
|
|
actual_headers = {b"User-Agent": [self.user_agent]}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request("GET", uri, headers=Headers(actual_headers))
|
|
|
|
body = yield make_deferred_yieldable(readBody(response))
|
|
|
|
if 200 <= response.code < 300:
|
|
return body
|
|
else:
|
|
raise HttpResponseException(response.code, response.phrase, body)
|
|
|
|
# XXX: FIXME: This is horribly copy-pasted from matrixfederationclient.
|
|
# The two should be factored out.
|
|
|
|
@defer.inlineCallbacks
|
|
def get_file(self, url, output_stream, max_size=None, headers=None):
|
|
"""GETs a file from a given URL
|
|
Args:
|
|
url (str): The URL to GET
|
|
output_stream (file): File to write the response body to.
|
|
headers (dict[str|bytes, List[str|bytes]]|None): If not None, a map from
|
|
header name to a list of values for that header
|
|
Returns:
|
|
A (int,dict,string,int) tuple of the file length, dict of the response
|
|
headers, absolute URI of the response and HTTP response code.
|
|
"""
|
|
|
|
actual_headers = {b"User-Agent": [self.user_agent]}
|
|
if headers:
|
|
actual_headers.update(headers)
|
|
|
|
response = yield self.request("GET", url, headers=Headers(actual_headers))
|
|
|
|
resp_headers = dict(response.headers.getAllRawHeaders())
|
|
|
|
if (
|
|
b"Content-Length" in resp_headers
|
|
and int(resp_headers[b"Content-Length"][0]) > max_size
|
|
):
|
|
logger.warning("Requested URL is too large > %r bytes" % (self.max_size,))
|
|
raise SynapseError(
|
|
502,
|
|
"Requested file is too large > %r bytes" % (self.max_size,),
|
|
Codes.TOO_LARGE,
|
|
)
|
|
|
|
if response.code > 299:
|
|
logger.warning("Got %d when downloading %s" % (response.code, url))
|
|
raise SynapseError(502, "Got error %d" % (response.code,), Codes.UNKNOWN)
|
|
|
|
# TODO: if our Content-Type is HTML or something, just read the first
|
|
# N bytes into RAM rather than saving it all to disk only to read it
|
|
# straight back in again
|
|
|
|
try:
|
|
length = yield make_deferred_yieldable(
|
|
_readBodyToFile(response, output_stream, max_size)
|
|
)
|
|
except SynapseError:
|
|
# This can happen e.g. because the body is too large.
|
|
raise
|
|
except Exception as e:
|
|
raise SynapseError(502, ("Failed to download remote body: %s" % e)) from e
|
|
|
|
return (
|
|
length,
|
|
resp_headers,
|
|
response.request.absoluteURI.decode("ascii"),
|
|
response.code,
|
|
)
|
|
|
|
|
|
# XXX: FIXME: This is horribly copy-pasted from matrixfederationclient.
|
|
# The two should be factored out.
|
|
|
|
|
|
class _ReadBodyToFileProtocol(protocol.Protocol):
|
|
def __init__(self, stream, deferred, max_size):
|
|
self.stream = stream
|
|
self.deferred = deferred
|
|
self.length = 0
|
|
self.max_size = max_size
|
|
|
|
def dataReceived(self, data):
|
|
self.stream.write(data)
|
|
self.length += len(data)
|
|
if self.max_size is not None and self.length >= self.max_size:
|
|
self.deferred.errback(
|
|
SynapseError(
|
|
502,
|
|
"Requested file is too large > %r bytes" % (self.max_size,),
|
|
Codes.TOO_LARGE,
|
|
)
|
|
)
|
|
self.deferred = defer.Deferred()
|
|
self.transport.loseConnection()
|
|
|
|
def connectionLost(self, reason):
|
|
if reason.check(ResponseDone):
|
|
self.deferred.callback(self.length)
|
|
elif reason.check(PotentialDataLoss):
|
|
# stolen from https://github.com/twisted/treq/pull/49/files
|
|
# http://twistedmatrix.com/trac/ticket/4840
|
|
self.deferred.callback(self.length)
|
|
else:
|
|
self.deferred.errback(reason)
|
|
|
|
|
|
# XXX: FIXME: This is horribly copy-pasted from matrixfederationclient.
|
|
# The two should be factored out.
|
|
|
|
|
|
def _readBodyToFile(response, stream, max_size):
|
|
d = defer.Deferred()
|
|
response.deliverBody(_ReadBodyToFileProtocol(stream, d, max_size))
|
|
return d
|
|
|
|
|
|
def encode_urlencode_args(args):
|
|
return {k: encode_urlencode_arg(v) for k, v in args.items()}
|
|
|
|
|
|
def encode_urlencode_arg(arg):
|
|
if isinstance(arg, str):
|
|
return arg.encode("utf-8")
|
|
elif isinstance(arg, list):
|
|
return [encode_urlencode_arg(i) for i in arg]
|
|
else:
|
|
return arg
|
|
|
|
|
|
def _print_ex(e):
|
|
if hasattr(e, "reasons") and e.reasons:
|
|
for ex in e.reasons:
|
|
_print_ex(ex)
|
|
else:
|
|
logger.exception(e)
|
|
|
|
|
|
class InsecureInterceptableContextFactory(ssl.ContextFactory):
|
|
"""
|
|
Factory for PyOpenSSL SSL contexts which accepts any certificate for any domain.
|
|
|
|
Do not use this since it allows an attacker to intercept your communications.
|
|
"""
|
|
|
|
def __init__(self):
|
|
self._context = SSL.Context(SSL.SSLv23_METHOD)
|
|
self._context.set_verify(VERIFY_NONE, lambda *_: None)
|
|
|
|
def getContext(self, hostname=None, port=None):
|
|
return self._context
|
|
|
|
def creatorForNetloc(self, hostname, port):
|
|
return self
|